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Lasko 20" Weather-Shield Performance 3-Speed Box Fan, 2000 CFM, White, 3720

4.3 stars out of 489 reviews
(4.3)|
489 ratings
Lasko 20" Weather-Shield Performance 3-Speed Box Fan, 2000 CFM, White, 3720Lasko 20 Weather Shield Performance Box Fan with 3 Speeds 3720 White 22 5 High New3 pack Lasko 20 Weather Shield Performance Box Fan with 3 Speeds 3720 White 22 5 High New
Pack Size:Single

Key item features

  • Features a 20-inch box fan design for powerful airflow in any room
  • Offers 3 refreshing speed settings to customize your cooling needs
  • Boasts Save-Smart energy efficiency, costing less than 2¢ per hour to operate
  • Equipped with a patented Weather Shield motor for worry-free window use
  • Includes a high-performance grille for ultimate airflow and cooling
  • Wider fan body structure provides greater stability and durability
  • Lightweight design with a convenient carry handle for easy portability
  • Equipped with Lasko's trusted, fused safety plug for added peace of mind
  • Use in conjunction with air conditioning to help circulate cool air throughout your space
  • Perfect for the bedroom, living room, home office, the garage and more
Current price is $41.99
Price when purchased online
  • Free shipping
  • Free 90-day returns
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Columbus, 43215
Arrives by Fri, Feb 20
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Sold by Lasko Products - Official Store
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4.5196668209162425 stars out of 5, based on 2161 seller reviews(4.5)
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Customer ratings & reviews

4.3 out of 5 stars
stars489 ratings289 reviews
How item rating is calculated
  1. 5 stars72% (350)
  2. 4 stars10% (49)
  3. 3 stars5% (24)
  4. 2 stars2% (9)
  5. 1 star12% (57)

Reviews summary

Pros
  • : Fits stably in window for outdoor use.
  • : Provides decent airflow with multiple settings.
  • : Offers good value at this cost.
Generated by AI

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Showing 1-3 of 289 reviews

Feb 6, 2026
Layal
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Practical fan

This 20” weather-shield performance 3-speed box fan (2000 CFM) in the white color from Lasko is a great device and option if you're looking to have a cool ambiance on a hot day! It's effective and practical to use and set up on 3 different modes. It's affordable and definitely recommended.

Helpful?37D1A429U1HU9204066
Jan 22, 2026
Stacy
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Excellent window fan

10/10 fan Very powerful It arrived pretty fast I recently purchased the window lasko window fan to help cool down my Bedroom/Living Room and overall, I'm very satisfied. It does its job I recommend it

Helpful?37D1A429U1HU9204066
Aug 24, 2022
Mel
5 out of 5 stars review

Verified Purchase

How to use a fan for a long life.

I have a theory, with logic and conclusion. First the observation: The makers of this fan made it so that when you turn it on, the first setting available is high, then medium, then low. The logic: Since we all know that getting a motor running requires more power than it does to just continue running, not allowing a full start up is hard on the motor. So if you quickly go to medium setting without letting the high setting run for a few seconds, you may in fact be shortening the life of the motor. The conclusion: If we want this fan to have maximum lifespan, we should, when starting up, allow a few seconds in High setting before going to Medium. And to take it one step further, we likewise should allow a few seconds in Medium before going into low. Perhaps this explains why some fans end up kinda slow, and others do not. Though admittedly theory, it is based on known startup demands of motors. At any rate, I am going to follow this procedure in the hopes my fan has a long life! So far so good.

Helpful?37D1A429U1HU9204066